Video: Dab tsi ntawm tsab ntawv yog siv los sawv cev rau tus tseem ceeb allele?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txawm li cas los xij, ntau tus kws tshawb fawb kuj siv tus lej loj thiab tus lej qis ntawv rau sawv cev tseem ceeb thiab rov ua dua gene, raws. Cov no ntawv zoo li muaj feem cuam tshuam rau qhov zoo hauv nqe lus nug, xws li tsab ntawv B rau sawv cev xim av qhov muag li ib tseem ceeb allele.
Yog li ntawd, hom ntawv twg siv los sawv cev rau qhov recessive allele?
Recessive alleles yog denoted los ntawm ib tug me me tsab ntawv (ib vs A). Tsuas yog cov tib neeg uas muaj genotype aa yuav qhia tau a rov zoo li qub ; yog li ntawd, cov xeeb ntxwv yuav tsum tau txais ib qho recessive allele los ntawm txhua tus niam txiv los nthuav qhia a rov zoo li qub.
Ib tug kuj yuav nug, vim li cas cov alleles sawv cev ua khub ntawm cov ntawv? Txhua khub ntawv sawv cev rau genotype ntawm ib lub noob. Dominance kev sib raug zoo ntawm cov alleles ntawm ib lub noob yuav tsum tau tshawb xyuas los ntawm qhov tsim nyog kev sim hla. Ntawd yog, peb paub los ntawm phenotype tias tus neeg muaj tsawg kawg yog ib qho tseem ceeb allele.
Ib yam li ntawd, dab tsi yog siv los sawv cev rau ib qho tseem ceeb allele?
Dominant Yam ntxwv. Ib qho zoo uas tuaj yeem pom yog tias muaj ib lossis ntau dua tseem ceeb cov noob muaj nyob. Cov tsiaj ntawv loj yog siv los sawv cev qhov zoo (ex: A) Rov qab Yam ntxwv. Ib qho zoo uas tsuas pom thaum ob lub noob rov ua dua , tab sis nws yog zais qab a tseem ceeb zoo if a cov gene yog tam sim no.
Ib qho piv txwv ntawm qhov tseem ceeb yog dab tsi?
Piv txwv ntawm Cov yam ntxwv tseem ceeb Cov plaub hau tsaus yog tseem ceeb tshaj cov plaub hau daj los yog liab. Cov plaub hau curly yog tseem ceeb tshaj cov plaub hau ncaj. Baldness yog ib qhov tseem ceeb . Muaj ib tug poj ntsuam lub ncov (ib tug V-puab plaub hau) yog tseem ceeb tshaj muaj ib tug ncaj hairline. Freckles, cleft puab tsaig thiab dimples yog tag nrho piv txwv ntawm qhov tseem ceeb.
Pom zoo:
Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm kev taw qhia ntawm tes los ntawm kev sib cuag lub cev ncaj qha?
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